Audio supply apparatus



FIG. 1 is a front view of an audio supply apparatus showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

The broken lines illustrate environmental structure and form no part of the claimed design. 

The ornamental design for a audio supply apparatus, as shown and described. 